Oldsmobile cars from the brand's last decade start 1G3, and the Bravada and Silhouette start 1GH, with General Motors LLC listed as the manufacturer on every pattern we decoded. The model year sits in position 10 and the plant in position 11, and that plant letter matters more on an Olds than you would think, because the same model sometimes came from two factories. Decode the VIN, make sure the engine and plant fit the car in front of you, then pull recalls and a history report before money changes hands.
We ran Oldsmobile patterns through NHTSA's free vPIC decoder on October 14, 2026. The newest of these cars is now 22 years old. The Associated Press, via NBC News, reported that GM announced in December 2000 it would end the line with the 2004 model year, and that the last Oldsmobile, an Alero, rolled off the Lansing Car Assembly plant on April 29, 2004. History.com puts the brand at 106 years old and more than 35 million cars built. If the 17 positions are new to you, read how to decode a VIN first.
Positions 1-3: 1G3 cars and 1GH trucks
The 1G3 prefix covers the late Olds cars, and the 1GH prefix covers the utility vehicles. A 2003 Alero pattern starting 1G3NL52F decoded to the 2.2-liter four from Lansing's South plant, and a 2004 Alero GLS starting 1G3NF52E came back with the 3.4 V6 from the same plant. A 2001 Aurora starting 1G3GS64C returned the 4.0-liter V8 from Orion, Michigan, and a 2002 Aurora starting 1G3GR64H came back with the 3.5 V6. The Intrigue patterns, a 1999 with the 3.8 V6 and 2000 and 2002 cars with the 3.5, all decoded to GM's Fairfax II plant in Kansas City, Kansas. On the truck side, a 2004 Silhouette starting 1GHDX03E decoded to Doraville, Georgia with the 3.4 V6.
A lot of these drivetrains are shared, so keep our Buick VIN decoder and Chevrolet VIN decoder nearby. The Alero shared its key and ignition recall with the Pontiac Grand Am, which our Pontiac VIN decoder covers.
Position 11: one model, two plants
The plant code is where we caught the most interesting split. Two 1999 Cutlass patterns with identical first eight characters decoded to different factories: the one with M in position 11 came back from Lansing's North plant, and the one with 6 came back from Oklahoma City, both with a 3.1 V6. The Bravada does the same thing across years. Our 2002 Bravada with the 4.2-liter inline six decoded to Oklahoma City, and a 2004 Bravada with the same engine came back from Moraine, Ohio. So if a seller says "all of these came from one plant," the VIN can prove him wrong in about ten seconds.
Positions 9 and 10: check digit and year
Position 9 is the check digit from 49 CFR 565.15. A typo usually fails it, though a cloned VIN copied from a real car still passes. Position 10 is the year, and the rule's year table is where people slip on Olds paperwork: 1997 is V, 1999 is X, 2000 is Y, then 2001 through 2004 are 1 through 4. A zero is never a valid year code. We proved it by accident, because a 2000 Intrigue pattern typed with a 0 in position 10 came back from vPIC with check digit and model year errors, and the same pattern with Y decoded clean. One of our 2003 Aurora patterns also came back with a 2.2-liter four, which does not match the V6 that the same engine letter returned on the 2002 car, so treat an odd decode as a reason to open the hood.
Recalls on an Oldsmobile VIN
Most Olds campaigns are old, but a few are big enough that you should ask about them. Recall 14V-400 covers 1999-2004 Aleros and 1998-2002 Intrigues, among 5.8 million GM cars, because weight on the key ring or a jolt can move the ignition switch out of run and shut the engine off. The fix is new key rings and a key insert or cover, so look at the key itself. 09V-116 covers 1998-1999 Intrigues with the 3.8 V6 where oil can drip on the hot exhaust manifold, and 15V-701 says that earlier fix did not fully remove the risk and replaces the front valve cover and gasket. On the Silhouette, 04V-597 replaces the power sliding door's interior handle on 1997-2004 vans. Run the VIN through our NHTSA recall check by VIN walkthrough, since the campaign list is what still gets fixed free.
History and price
A decode will not show a salvage brand, an odometer rollback or a flood title, and a 20-year-old car is exactly where a title gets washed through a few states. CARFAX says its reports draw on title, odometer, ownership and accident records, so pull one yourself and skip the seller's printout. As of mid October 2026, a CARFAX report through us runs about $5.50 as a guest or about $4.50 as a member, and a CARFAX plus AutoCheck bundle is about $6.75, versus roughly $39.99 to $44.99 at retail. Confirm at checkout. We are a licensed CARFAX and AutoCheck reseller, not affiliated with CARFAX, AutoCheck, or Experian.
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